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.. index::
   single: Systems; Webstatic

=========
Webstatic
=========

Purpose
=======

This system provides a web server for serving static content. HTTP requests
for this system are proxied through :doc:`web` which also handles TLS
termination and redirects from http scheme URLs to https.

Application Links
-----------------

Code Documentation
   https://codedocs.cacert.org/

Funding
   https://funding.cacert.org/

Infrastructure Documentation
   https://infradocs.cacert.org/

Administration
==============

System Administration
---------------------

* Primary: :ref:`people_jandd`
* Secondary: None

.. todo:: find an additional admin

Application Administration
--------------------------

+---------------+---------------------+
| Application   | Administrator(s)    |
+===============+=====================+
| Apache httpd  | :ref:`people_jandd` |
+---------------+---------------------+
| Gitolite      | :ref:`people_jandd` |
+---------------+---------------------+

Contact
-------

* webstatic-admin@cacert.org

Additional People
-----------------

No additional people have access to this machine.

Basics
======

Physical Location
-----------------

This system is located in an :term:`LXC` container on physical machine
:doc:`infra02`.

Logical Location
----------------

:IP Internet: reverse proxied from :doc:`web`
:IP Intranet: :ip:v4:`172.16.2.116`
:IP Internal: :ip:v4:`10.0.0.116`
:MAC address: :mac:`00:ff:67:39:23:f2` (eth0)

.. seealso::

   See :doc:`../network`

.. index::
   single: Monitoring; Webstatic

Monitoring
----------

:internal checks: :monitor:`webstatic.infra.cacert.org`

DNS
---

.. index::
   single: DNS records; Webstatic

=========================== ======== ====================================================================
Name                        Type     Content
=========================== ======== ====================================================================
codedocs.cacert.org.        IN CNAME web.cacert.org.
funding.cacert.org.         IN CNAME web.cacert.org.
infradocs.cacert.org.       IN CNAME web.cacert.org.
webstatic.cacert.org.       IN A     213.154.225.242
webstatic.cacert.org.       IN SSHFP 1 1 30897A7A984D8350495946D54C6374E9331237EF
webstatic.cacert.org.       IN SSHFP 1 2 32BB10C5CF48532D077066E012230058DDF3CCE731C561F228E310EB7A546E3F
webstatic.cacert.org.       IN SSHFP 2 1 868361A51EC60607BFD964D0F8F3E4EE5E803FC6
webstatic.cacert.org.       IN SSHFP 2 2 A173BB85EC19F63ECB273BCA130EF63501FE1B89FD55B62997195E6816CAB547
webstatic.cacert.org.       IN SSHFP 3 1 7FC847CEC20B9D65296D4A0EDAFBA22A14EE9DC4
webstatic.cacert.org.       IN SSHFP 3 2 68879264E0ED5D0914797BF2292436FB32CCA24683DCF5D927A53589C1BFB6D7
webstatic.intra.cacert.org. IN A     172.16.2.116
=========================== ======== ====================================================================

.. seealso::

   See :wiki:`SystemAdministration/Procedures/DNSChanges`

Operating System
----------------

.. index::
   single: Debian GNU/Linux; Stretch
   single: Debian GNU/Linux; 9.4

* Debian GNU/Linux 9.4

Applicable Documentation
------------------------

This is it :-)

Services
========

Listening services
------------------

+----------+-----------+-----------+----------------------------+
| Port     | Service   | Origin    | Purpose                    |
+==========+===========+===========+============================+
| 22/tcp   | ssh       | ANY       | admin console access       |
+----------+-----------+-----------+----------------------------+
| 25/tcp   | smtp      | local     | mail delivery to local MTA |
+----------+-----------+-----------+----------------------------+
| 80/tcp   | http      | ANY       | application                |
+----------+-----------+-----------+----------------------------+
| 5666/tcp | nrpe      | monitor   | remote monitoring service  |
+----------+-----------+-----------+----------------------------+

Running services
----------------

.. index::
   single: apache httpd
   single: cron
   single: exim
   single: nrpe
   single: openssh
   single: puppet agent
   single: rsyslog

+--------------------+----------------------+----------------------------------------+
| Service            | Usage                | Start mechanism                        |
+====================+======================+========================================+
| Apache httpd       | Webserver for static | init script                            |
|                    | content              | :file:`/etc/init.d/apache2`            |
+--------------------+----------------------+----------------------------------------+
| cron               | job scheduler        | init script :file:`/etc/init.d/cron`   |
+--------------------+----------------------+----------------------------------------+
| Exim               | SMTP server for      | init script                            |
|                    | local mail           | :file:`/etc/init.d/exim4`              |
|                    | submission           |                                        |
+--------------------+----------------------+----------------------------------------+
| Nagios NRPE server | remote monitoring    | init script                            |
|                    | service queried by   | :file:`/etc/init.d/nagios-nrpe-server` |
|                    | :doc:`monitor`       |                                        |
+--------------------+----------------------+----------------------------------------+
| openssh server     | ssh daemon for       | init script :file:`/etc/init.d/ssh`    |
|                    | remote               |                                        |
|                    | administration       |                                        |
|                    | and git access       |                                        |
+--------------------+----------------------+----------------------------------------+
| Puppet agent       | configuration        | init script                            |
|                    | management agent     | :file:`/etc/init.d/puppet`             |
+--------------------+----------------------+----------------------------------------+
| rsyslog            | syslog daemon        | init script                            |
|                    |                      | :file:`/etc/init.d/syslog`             |
+--------------------+----------------------+----------------------------------------+

Connected Systems
-----------------

* :doc:`jenkins` for publishing code documentation to codedocs.cacert.org and
  infrastructure documentation to infradocs.cacert.org
* :doc:`monitor`
* :doc:`web` as reverse proxy for hostnames funding.cacert.org and
  infradocs.cacert.org

Outbound network connections
----------------------------

* :doc:`infra02` as resolving nameserver
* :doc:`emailout` as SMTP relay
* :doc:`puppet` (tcp/8140) as Puppet master
* :doc:`proxyout` as HTTP proxy for APT

Security
========

.. sshkeys::
   :RSA:     SHA256:MrsQxc9IUy0HcGbgEiMAWN3zzOcxxWHyKOMQ63pUbj8 MD5:da:e7:16:f9:98:b0:77:4f:38:a6:49:35:a5:5a:2a:c2
   :DSA:     SHA256:oXO7hewZ9j7LJzvKEw72NQH+G4n9VbYplxleaBbKtUc MD5:12:a5:87:27:6b:2f:e3:cd:d6:e5:fb:f2:43:2f:7c:be
   :ECDSA:   SHA256:aIeSZODtXQkUeXvyKSQ2+zLMokaD3PXZJ6U1icG/ttc MD5:5e:94:ad:e8:84:3b:e2:b0:0b:7f:44:ec:a9:99:95:b2
   :ED25519: SHA256:NC34l1qSufrBdjxjJk75oOnmhrQW1VkLILsOhJle77A MD5:da:58:d0:89:23:6f:ca:f7:b2:5f:a3:51:2f:6b:95:0d

Dedicated user roles
--------------------

+-------------------+---------------------------------------------------+
| Group             | Purpose                                           |
+===================+===================================================+
| jenkins-infradocs | Used by :doc:`jenkins` to upload documentation to |
|                   | :file:`/var/www/codedocs.cacert.org/html/` and    |
|                   | :file:`/var/www/infradocs.cacert.org/html/`       |
+-------------------+---------------------------------------------------+

Non-distribution packages and modifications
-------------------------------------------

The Puppet agent package and a few dependencies are installed from the official
Puppet APT repository because the versions in Debian are too old to use modern
Puppet features.

Risk assessments on critical packages
-------------------------------------

Apache httpd is configured with a minimum of enabled modules to allow serving
static content and nothing else to reduce potential security risks.

Access to the jenkins-infradocs user is gated by a defined ssh key.

The system uses third party packages with a good security track record and
regular updates. The attack surface is small due to the tightly restricted
access to the system. The puppet agent is not exposed for access from outside
the system.

Critical Configuration items
============================

The system configuration is managed via Puppet profiles. There should be no
configuration items outside of the Puppet repository.

.. todo:: move configuration of :doc:`webstatic` to Puppet code

Keys and X.509 certificates
---------------------------

The host does not provide TLS services and therefore has no certificates.

.. todo::
   move the TLS configuration for the served VirtualHosts to :doc:`webstatic`

Apache httpd configuration
--------------------------

The main configuration files for Apache httpd are:

* :file:`/etc/apache2/sites-available/000-default.conf`

  Defines the default VirtualHost for requests reaching this host with no
  specifically handled host name.

* :file:`/etc/apache2/sites-available/codedocs.cacert.org.conf`

  Defines the VirtualHost for https://codedocs.cacert.org/

* :file:`/etc/apache2/sites-available/funding.cacert.org.conf`

  Defines the VirtualHost for https://funding.cacert.org/

* :file:`/etc/apache2/sites-available/infradocs.cacert.org.conf`

  Defines the VirtualHost for https://infradocs.cacert.org/


Tasks
=====

Changes
=======

Planned
-------

.. todo:: manage the webstatic system using Puppet

System Future
-------------

* No plans

Additional documentation
========================

.. seealso::

   * :wiki:`Exim4Configuration`

References
----------

* http://httpd.apache.org/docs/2.4/